Method of producing expansible-collapsible elements



Nov. 1, 1927.

1,647,185 H. c. MALLORY METHdD OF PRODUCING EXPANSIBLE COLLAPSIBLE ELEMENTS Original Filed Aug. 31. 1920 sitive or flexibleend portions extending termediateorbody portion 13. As shown 60 Patented Nov. 1, 1927. r r UNlT' EDlSTATES HARRY C. MALIIORY, DECEASED, LATE OF BELLPORT, NEXV YORK, BY SUE R. MALLORY,

v ADMINISTRATRIX, OFBELLPORT, NEW YORK; HARRY G. MALLORY, ASSIGNOR, BY I "MESNE ASSIGNMENTS, TO AMERICAN RADIATOR COMPANY,OF CHICAGO, ILLINOIS, A CORPORATION OF NEW'JERSEY i I ,METHOD OF PRODUCING EXPANSIBLE-COLLAPSIBLE ELEMENTS.

. Original application filed August 31, maeser ai n iomior Divided and'tth is application filed iui g @5, 1925. Serial No.,46,104. 1 1

The invention relates to improvements in cal shell having an open end portion 11, a metallic expansible-collapsible. elements closed end portion 12, and an intermediate adapted. for use in connectionwith'thermoor vbody'portion 13. :The shell 10 is provided sensitive or pressure sensitive devices, and 7 adjacent to its ends 11 and 12 with flat, sub- 5 for other purposes, and the same has for its stantially inelastic annular portions 11, 12*, object to provide an elementhaving an. exrespectively, the walls ofwhich, are made. tremely sensitive "body portion, and less senconsiderably thicker than'the Wall of the inther efrom. 1 I I j in the drawingsthe closed end 12fisof the 10 Further, said invention has for its object same thickness as the annular portion. 12 to provide an expansible-coll'apsible element from which it is formed. H v 1 having a flexible or elastic body portion, a The wall of the body portion 13 is Inadev substantially inelastic or rigid portion or uniformly thinner than the, end portions 11, '65 portions-extending therefrom, and ,interme- 12, and is provided with a series ofparallel 1 diate portions possessing less elasticity or circumferential corrugations 14. Between flexibility connecting said elastic or flexible the ends of the corrugated body portion 13 body portion with said inelastic or rigid end and the end portions 11, 12 are formed anportion or portions. I nular, tapering portions 15, which become Further, said invention hasfor its object thinner as. the same approach the opposite 20 to provide an expansible-collapsible element end portions of the corrugated body portion having a flexible or elastic body portion, a 13 withwhich thesame merge. q substantially inelastic or rigid heavier end The tapering, annular portions15 are proportion extending from one or both of the. vided with circumferential corrugationsulfi, ends of said body portion, and annular 'porwhich become progressively shallower as the tions whose walls taper from said heavier metal ofthe shell Wall in which they are end portions towards said body portion and formed becomes heavier. 'That is to say,the provided with corrugations which become corrugations are deeper and most elastic at V progressively shallower as the same apthe central part of the intermediate 01 body proach said heavier end portions with which portion and become "shallower asv they re- 30 the same merge. w i cede'from said corrugated intermediate or Further, said invention has for its'object body portion 13 whereby the flexing "moveto provide a sim le, convenient and inexincnt of the elasticbody portion of the shell I pensive method 0 producing an expansibleis distributed over a greater area to obvi- S5 collapsible element of the character speciate the liability of the flexible body part 35 fied. 1 p p of the shell becoming fractured where the Other objects willin part be obvious, and same :unites with the substantially, inelastic in part be pointed out hereinafter f or rigid end portions 11, 12. v a v To the attainment of the aforesaid objects iIt will, of course, be understood that the and views the invention consists in the sevshell 10 may be made with both end por- 4 eral steps constituting the method herein- ,tions open, although it herein shown-as after more fully described, and then pointed having an open end and a closed end. The out in the claims, i closed end 12 and the annular portion 12 In the accompanying drawings forming extending therefrom as well as the annular part of this specification, wherein like nuportion 1'1" at the open end may be made merals of reference indicate like parts, heavier or of greater thickness than the cor- Figure 1 is a side, elevation showing one rugated intermediate or body portion. One form of expansible-collapsible element conof said ends may also be heavy or thick and structed according to, and embodying the the other end thinner, or both of said ends said invention; may be formed thinner than said body por- 50 Fig. 2 is a bottom view thereof, and tion.

Fig. 3 is a central vertical section.' In this case no claim is made for the In said drawings 10 designates a cylindri-' product resulting from the process herein described and claimed, as said product constitutes the subject matter of an application, Serial Number 407,210, filed by Harry G. Mallory August 81, 1920-, and patented July 28, 1925, No. 1,547,431, of which this application is a division. 7

Having thus described the said invention, What is claimed and desired to secure by Letters Patent is V 1. The process of making an expansiblecollapsible element which consists in taking a tubular shell having an inelastic tubular end portion, and forming in the intermediate portion of said shell circumferential corrugations successively diminishing in depth towards said end portion, substantially as specified.

2. The process of making an expansiblecollapsible element which consists inyforming a shell comprising an intermediate portion and end portions, and circumferentially corrugating said intermediate portion and forming therein corrugations successively diminishing in depth towards each of said end portions, substantially as specified.

3.'The process of making an eXpansiblecollapsible element which consists in forming 'a shell comprising a body portion, an end portion having a wall of greater thickness than that of said body portion, and a tapering portion uniting said body portion with said end "portion, circumierentially corrugating said body portion, and forming in said tapering portion corrugations successi v'ely diminishing in depth towards said end portion, substantially as specified.

4. The processor making an expansiblecollapsible element which consists in forming a shell comprising a body portion, end portions having Walls of greater thickness than that ofsaid body portion, and tapering portions uniting said body portion with said end portions, circumierentially corrugating said body portion, and forming in each of said tapering portions corrugations successively dnnnnshing in depth towards the end portion adjacent thereto, substantial ly 'as specified.

5. The'p'rocess of making an expansiblecollapsible element which consists in forming a'shell comprising a body portion and an end portion, circumferentially corrugating said body portion, and forming a series of corrugations of gradually diminishing depth intermediate said body and end portions, substantially as specified. V

6. The process of making an expansiblecollapsible element whiclrconsists in forming a shell comprising a body portion and end portions, circumterentially corrugating said body portiom and iorniingse-ries of corrugations of gradually diminishing depth inga shell comprising a body portion, an end 0 portion of greater thickness than said body portion, and an annular tapering portion uniting said body portion with said end portion, circumferentially corrugating said body portion with corrugations oriolds of uniform depth, and corrugating saidt'apering portion with corrugations becoming shallower as the same approachsaid end portion with which the same merge, substantially as specified.

9. The process of making an eXpansiblecollapsible element which consists in form ing a shell comprising a-cylindricalbody portion, end portions'of greater thickness than-said body portion, and annular tapering portions uniting said body portion with said end portions, circumferentially corrugating said body portion with corrugations or-folds of uniform depth, and corrugating said tapering portions with corrugations becoming shallower as the same approach said end portions with which the same merge, substantially as specified. V

signed at the city of New York," in the county and State ofNew York, this 22nd day of July, one thousand nine hundred and twenty-five. r I

r V SUE R. MALLORY, Administmwiw of the Estate of Harry 6".

Mallory, Deceased. i 

